/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */

package org.apache.mina.protocol.dns.io.decoder;

import java.util.Map;
import java.util.TreeMap;

import org.apache.mina.common.IoBuffer;
import org.apache.mina.protocol.dns.DnsAttribute;

/**
 * A decoder for NS records.  NS records are encoded as per RFC-1035:
 * 
 * <pre>
 *   3.3.11. NS RDATA format
 *
 *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *     /                   NSDNAME                     /
 *     /                                               /
 *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *
 *   where:
 *
 *   NSDNAME
 *     A <domain-name> which specifies a host which should be authoritative for
 *     the specified class and domain. 
 * </pre>
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev: 84 $, $Date: 2008-02-22 16:33:48 +0000 (Fri, 22 Feb 2008) $
 */
public class NameServerRecordDecoder implements RecordDecoder {
    public Map<String, Object> decode(IoBuffer IoBuffer, short length) {
        Map<String, Object> map = new TreeMap<String, Object>();
        map.put(DnsAttribute.DOMAIN_NAME, DnsMessageDecoder
                .getDomainName(IoBuffer));
        return map;
    }
}
